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  <title>Returns the error message of the last PCRE regex execution</title>
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    <li>Returns the error message of the last PCRE regex execution</li>
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  <div id="layout-content"><div id="function.preg-last-error-msg" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">preg_last_error_msg</h1>
  <p class="verinfo">(PHP 8)</p><p class="refpurpose"><span class="refname">preg_last_error_msg</span> &mdash; <span class="dc-title">Returns the error message of the last PCRE regex execution</span></p>

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 <div class="refsect1 description" id="refsect1-function.preg-last-error-msg-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>preg_last_error_msg</strong></span>(): <span class="type">string</span></div>

  <p class="para rdfs-comment">
   Returns the error message of the last PCRE regex execution.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.preg-last-error-msg-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.preg-last-error-msg-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the error message on success, or <code class="literal">&quot;No error&quot;</code> if no
   error has occurred.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.preg-last-error-msg-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4724">
    <p><strong>示例 #1 <span class="function"><strong>preg_last_error_msg()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />preg_match</span><span style="color: #007700">(</span><span style="color: #DD0000">'/(?:\D+|&lt;\d+&gt;)*[!?]/'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'foobar&nbsp;foobar&nbsp;foobar'</span><span style="color: #007700">);<br /><br />if&nbsp;(</span><span style="color: #0000BB">preg_last_error</span><span style="color: #007700">()&nbsp;!==&nbsp;</span><span style="color: #0000BB">PREG_NO_ERROR</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">preg_last_error_msg</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Backtrack limit exhausted
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.preg-last-error-msg-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.preg-last-error.html" class="function" rel="rdfs-seeAlso">preg_last_error()</a> - 返回最后一个PCRE正则执行产生的错误代码</span></li>
   </ul>
  </p>
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